Ring shaping machine



Sept. 11, 1945. R. STENWALL I RING SHAPING MACHINE 3 Sheets-Sheet 1 Filed July 3, 1944 u a E M a w r S Tmy MAn my w b m 7 9 33 Sept. 11, 1945. I R W L 2,384,705

RING SHAPING MACHINE Filed July 5, 1944 I 3 Sheets-Slide; 2

. lnuerflor Roberf Sfznwall Sept. 11, 1945. R. STENWALL RING SHAPING MACHINE Filed July 3, 1944 3 Sheets-Sheet 3 H s mm m mh n m r T e Y b M o R Patented Sept. 11, 1945 UNITED STATES ATENT} OFFICE 2,384,705 I RIN SHAPING MACHINE Application July 3, 1944, Serial No. 543,234 8 Claims. (01. 51-127) This invention relates to a ring shaping machine, and is more particularly and specifically directed to a machine which in practice has been designed for grinding the outside of out-of-round piston ring castings or piston ring blanks which may be obtained by sawing or otherwise cutting transversely a double width piston ring casting,

or a sleeve which may have a length sufficient to produce a plurality of the individual piston ring blanks. In piston ring casting, the casting are not of-a circular form but are produced by cutting across at one side a circular pattern ofthe proper size for the ring which is to'be produced,

the pattern being spread at such cutting and a segment inserted which provides an out-of-round pattern from which out-of-round ring castings are made. The machine which I have designed is for the purpose of properly grinding the outer curved surface of the ring castings. from the patterns produced in this manner or in a manner cating table of a standard grinding machine and which, in conjunction with such table and the grinding wheel of the grind ng machine, will properly move the ring castings across the face of the grinding wheel and machine the out-ofround. piston ring castings accurately and very rapidly and expeditiously with a large quantity production attained.

An understanding of the invention may b had from the following description taken in connection with the accompanying drawings, in which,

Fig. 1 is a vertical elevation partly in section, the section being taken on the plane of line l---! of Fig. 3 and looking to the right.

Fig; 2 is a fragmentary enlarged vertical section showing a construction of the rotating spindle and table which carries a plurality of the piston ring castings for grinding, it being one feature of the invention that a large number of the castings may be simultaneously ground.

Fig. 3 is a transverse vertical section substantially on the plane of line 3-3 of Fi 1 through the attachment which is applied to the table of the grinding machine, said table and the grinding wheel of the machine being shown in elevation.

Cir

Fig. 4 is a plan view of the ring casting hold arbor.

Fig. 5 is a horizontal section through the upper portion of said attachment, the major portion of the mechanism being shown in plan, and

Fig, 6 is an enlarged horizontal sectionshowing a fragmentary portion of the grinding wheel and of the ring casting holding arbor with a ring casting thereon shown in plan. V

, Like reference characters refer to like parts in the difierent figures of thedrawing.

The mechanism which I have designed for the purpose stated is a a ted to be detachably secured to theupper side of a reciprocating table of a grinding machine, the body of the machine being indicated at I (Fig. 3), the reciprocating table at 2 and the grinding wheel at 3 turnable upon a horizontal axis and supported above the .plane of the table 2 by any suitable support as indicatedat 1. No detail of the reciprocating mechanism for the table g is shown as it is old and well known.

The piston ring casting shaping mechanism in- "cludesan outer housing support having a horizontal bottom 5, adapted to be located againstthe topof the table 2, andgenerally vertical sides 6 and! with lugs 8 extending horizontally outward from adjacent the ends of said sides 6 and I, through which bolts or equivalent fastening means are passed to detachably secure the machine to the table 2, it being understood that the upper side of the table 2 has longitudinal T-shaped slots therein for the reception of heads of bolts for securing work to the table, and. which work may be attached ata desired place thereon; and in the use of my invention the outer supporting housing of the machine may be secured at the upper side of the table at a desired and selected position with reference to the grinding wheel.

At the upper longitudinal edges of the sides 6 and 1 horizontal ways 9 and In are formed, and in the side I an opening is made with lower and upper horizontal guides I l and I2 in which a vertical plate 13 is 'adjustably mounted, and'mav be'adjusted to different positions by a screw id at the outer end of which is a hand wheel i5 for manual operation. An arm I6 is formed integral with or permanently secured to the inner side of p the plate [3 and extends upwardly and inwardly therefrom and at its free end is formed" with a head l1, connected with which is a. rotating circular bearing disk l8, anti-friction bearings being "disposed between the disk I8 and the head I1. 'A' horizontal rod [9 is mounted upon a lug 20 extending upwardly from the head H, the purpose of which will hereafter appear.

The ends of the supporting housing are largely open permitting a mounting of and horizontal movement of an inner housing which carries the main portion of the mechanism. Said inner housing has vertical spaced sides 2| and 22 and ends 23 and 24 as shOWn (Fig. The side 22 adjacent the side I of the outer fixed housing has an opening through which the arm l6 passes. At their upper edges the sides 2| and 22 of the second described housing are formed with outwardly extending horizontal flange portions 25 and suitable anti-friction bearings 25 are interposed between said parts 25 and the ledges or Ways 9 and I I] previously described.

The top of the inner movable housing at 2'!- and the bottom Zla thereof are largely open (Fig. 1) the opening in the top being covered in practice by a cover plate 28, below which the interior mechanism carried by the movable housing is located. Coiled tension springs 29 are connected one at each end of the rod l9 (Fig. 5) and at their other ends are connected to eye bolts 35, the threaded end portions of which pass through lugs 3| extending inwardly from the sides 2| and 22 (Fig. 5) and receive nuts 39:: by which the tension of the springs may be adjusted. It is evident that the tendency of the springs is to move the inner movable housing to the left (Figs. 1 and 5).

Integral with the end 24 of the inner housing a vertical cylindrical sleeve ;32 is cast. ,A spindle 33 provided at its upper end with a horizontal circular table 34 extends downwardly through the sleeve 32 and is mounted for rotation by means of suitable anti-friction bearings 35 (Fig. 2). .The spindle at its lower end has a pinion 36 secured thereto. The table 34 at its upper sidehas a continuous groove 34a therein to receive the lower edges of a hollow vertical sleeve arbor 31 around which a plurality of out-of-round piston ring castings 38 are placed. Said sleeve arbor 31 (Fig. 6) at one side is provided with a guide rib 31a complementary to marking notches made vertically across the inner sides of the ring castings. thereby insuring the proper location of the ring castings on the arbor sleeve. Said. sleeve 31 is an out-of-round form corresponding to the inner shapes and dimensions of the ring castings.

The spindle 33 has a vertical axial opening bored or otherwise formed therethrough, through which a rod 39 passes and which extends upwardly above the uppermost ring casting 38 (Figs. 1 and 3). A clamping disk 40 is located against the uppermost ring casting 38 over which a releasable U-shaped key is placed in connection with the upper end portion of the rod 49 which is grooved at opposite sides (Fig. 4') for the reception and retention of the key.

Rod 39 at its lower end below the pinion 36 is provided with a collar 42 with which the forked end of a lever 43 engages, said lever being pivotally mounted between its ends on a suitable brackt 44 (Fig. 3) carried by the inner housing. A piston rod 45 is connected at its lower end to the opposite end of the lever and enters avertical cylinder 45 connected to a piston therein (not shown) said cylinder being suspended from a bracket 41. By controlling the entrance of compressed air or other equivalent pressure fluid into the cylinder 46, rod 39 may be moved and when moved in a downward direction will force the clamping plate 40 against the uppermost piston ring casting to clamp the plurality of ring castings 38 between said plate 40 and table 34.

The pinion 36 fixed to the lower end of the spindle 33 is in mesh with an idle gear 48 mounted on and below a transverse partition 49 cast integral with the body of the inner housing, and said gear 48 is also in mesh with a pinion 50 opposite the pinion 36 and of the same size. The pinion 50 is secured at the lower end portion of a shaft 5| which extends upwardly through a suitable journal 52 integral with and located above the partition 49. Above said journal it carries a cam 53 which i removably secured on the shaft 5| by means of nuts as shown (Fig. 1).

p The cam 53 bears against the face of the disk l8 and is held thereagainst by the force of the springs 29. A worm gear 54 is secured to the shaft 5| above the pinion 50 and below the partition 49 (Fig. 1) and is in mesh with a worm shaft 55. An electric motor 56 supported within the movable housing and upon the bottom at 21a has a drive pulley 51 secured to its shaft which drives a belt 58 which in turn drives a speed reducer 59, the speed reducer through a belt 60 driving the worm" shaft 55. It is evident that with this construction the spindle 33 and the shaft 5| are driven at the same speeds and in the same direction.

Operation The grinding machine attachment described is mounted upon the table 2 at a position such that the outer surfaces of the ring castings 38 are brought substantially into proper grinding engagement with the face of the grinding wheel 3 when moved thereacross. A close and accurate adjustmnt is then effected by operation of the adjusting screw 54 which moves head I! and bearing disk iii in the proper direction to effect such engagement and control the extent of the grinding which takes place against the outer curved surfaces of the ring castings 38. A plurality of ring castings 38 are placed on the sleeve arbor 31 and the arbor upon the table 34, the clamping plate 49 located in place and the key 4| connected with the rod 39 as in Fig. 4, and then by introducing compressed air into the cylinder 46 the plate 49 is drawn in a downward direction securely clamping the ring castings together. The periphery of the cam 53 is in exact accordance with the surfaces to be ground upon the ring castings. As it turns with the same speed as the ring castings its periphery is pro duced at the outer curved surfaces of the ring castings when they are moved with the reciprocation of the table 2 across the face of the grinding wheel. By reason of the yielding pressure engagement of the ring castings against the face of the grinding wheel provided by the springs 29, any projections or irregularities in the outer surface of the ring castings, when they come against the surface of the grinding wheel 3, permit a sufficient movement of the inner housing in a direction away from the face of the grinding wheel that danger of breakage or other damage is obviated.

The rotation of the grinding wheel and of the ring castings results in a complete machining of the outer curved surfaces of the ring castings and to a shape governed by the peripheral contour of the cam 53. After the castings are ground they are removed by releasing the pneumatic pressure in the cylinder 46, withdrawing the key 4| and the clamping plate 40 and replacing them with a second series of castings, it of course being understood that the reciprocation of the table 2 and the electric motor are stopped from operation during the ring casting loading step. The extent of cut is readily controlled and governed by means of the manually operable adjusting screw l4, and upon wearing away of the face of the grinding wheel an adjustment to compensate therefor is made by the same means. The construction described is very practical and useful and with it close and accurate and very rapid quantity production in shaping the outer surfaces of the out-of-round piston ring casting is attained. The cam 53 is controlling of the shape which is to be produced, and with different exterior diameters of rings control cams 53 to correspond therewith are used, each being removable and replaceable by another through ready accessibility for such purpose by removing the cover plate 28.

The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

I claim:

1. In a machine adapted to be secured to the upper side of a horizontal reciprocating table of a grinding machine and be located at a side of the grinding wheel of said machine, a housing adapted to be secured to said table, a second housing movably mounted on and within the first housing, spring means between said housing tending to move the movable housing toward the grinding wheel, an arm on the fixed housing extending into the movable housing and provided at its inner end with a vertically positioned rotatably mounted disk, a shaft vertically mounted within the movable housing, a horizontal cam secured on said shaft and moved by said spring means to bear against said disk, a vertical spindle rotatably mounted on the movable housing, means for driving said shaft and spindle at the same speed and in the same direction, and means for releasably holding a plurality of rings on and above the upper end of said spindle, as specified.

2. A construction as defined in claim 1, said arm being movably mounted upon said fixed housing for adjustment in a direction toward or away from said shaft, and a manually operable adjustable screw connected with said arm for adjusting it to different positions.

3. In a construction of the class described, an outer housing having spaced generally vertical sides and having means whereby it may be secured to the upper side of a reciprocating table of a grinding machine, a second housing having spaced vertical sides located between the sides of the first housing, interengaging means on said housings for mounting the second housing for movement in the direction of its length relative to the first housing, one'of the sides of said second housing having an opening therethrough, an arm mounted on the first housing extending through said opening and into the second housing, a rotatably mounted disk positioned in a substantially vertical plane and rotatable about a horizontal axis carried at the inner end of said arm, a vertical rotatable shaft mounted on and carried by the second housing to one side of said disk, a cam on said shaft adapted to bear against a side of the disk, spring means interposed between said arm and the second housing for moving the cam into engagement with said disk, a vertical spindle rotatably mounted on and carried by said housing, means for continuously driving said shaft and spindle at the same speed and in the same direction, a horizontal table at the upper end of the spindle, and means for releasably holding and clamping together a plurality of ring castings on and above said table.

4. A construction as defined in claim 3, said side of the first housing having an opening therethrough through which said arm extends, horizontal guides carried by said side of the housing above and below said opening, a plate slidably mounted in said guides to which the arm is attached, and manually operated screw means connected with said plate and carried by said first housing for adjustably changing the position of said plate, arm and disk.

5. In a construction of the class described, an outer housing having spaced apart upwardly extendingsides and having means whereby it may be releasably secured to the upper side of a horizontal reciprocating table of a grinding machine, a second housing having spaced vertical sides disposed between the sides of the first housing, means for mounting said second housing on the first housing for movement thereon .with respect thereto in the direction of the length of said second housing, one side of the second housing having an opening therethrough, an arm mounted on the adjacent side of the first housing extending through said opening, a vertically disposed disk mounted to turn about a horizontal axis at the inner end and at a side of said arm, a vertical shaft mounted on and within the second housing, a cam detachably connected to said shaft at its upper end portion adapted to bear against an adjacent side of said disk, spring means between said arm and the sides of said second'housing yieldingly moving said cam into bearing engagement against said disk, motor driven means for driving said shaft, a vertical spindle mounted on said second housing, said arm being disposed between the shaft and spindle, gearing between said shaft and spindle whereby the spindle is driven by the shaft at the same speed and in the same direction, a horizontal table at the upper end of the spindle, an arbor adapted to be detachably located on and above said table and around which a plurality of ring castings in superimposed relation to each other are adapted to be held, and releasable means for clamping said rings against .each other and against the upper side of said table, as specified.

6. A construction containing the elements in combination defined in claim 5, said spindle being located at an end of said housing and the table at the upper end of the spindle extending partly beyond said end of the housing, and said cam F and said shaft being located between the ends of the housing and the motor driving means within said second housing and adjacent the opposite end thereof.

7. In a construction of the class described, a movably mounted support, a motor driven shaft thereon, a spindle thereon driven by said shaft at the same speed, a cam carried by said shaft, a disk mounted to turn about an axis perpendicular to the axis about which the cam turns, yielding means for moving the cam into engagement with the disk and means for releasably holding a ring on said spindle whereby said ring turns with said spindle about its axis of rotation.

8. A construction containing the elements in combination defined in claim '7 combined with means for adjusting said disk longitudinally of its axis.

ROBERT STENWALL. 

